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प्रश्न
State whether a solar cell produces a.c. or d.c.
उत्तर
Solar cell produces d.c. (direct current).
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संबंधित प्रश्न
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Name the two groups in which various sources of energy are classified. State on what basis are they classified.
Select the renewable and non-renewable sources of energy from the following:
Coal
What is wind energy?
Name the energy changes for each of the following cases:
dynamo
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
State the energy changes which take place when:
Electricity obtained from nuclear energy.
A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms−2]
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
Unit of calorific value of a substance is ____________.
